.header {
    height: 45px;
    line-height: 45px;
    background-color: #f0f0f0;
    padding: 0 10px;
    text-align: center;
    color: rgb(255, 58, 51);
    position: relative;
    z-index: 300;
  }
  
  .header__back {
    padding-left: 16px;
    position: absolute;
    left: 10px;
    color: #333;
    font-size: 14px;
  }
  
  .header__back::before {
    border: rgb(255, 75, 51) solid 3px;
    position: absolute;
    left: 0;
    top: 50%;
    margin-top: -8px;
    display: block;
    content: '\20';
    width: 12px;
    height: 12px;
    border-top: none;
    border-right: none;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
  }
  
  .header__title {
    color: #333;
    font-size: 16px;
  }